Windproof yet highly breathable. Warm yet lightweight. THE ONE™ SHIRT-JAC features KÜHL’s temperature-regulating Aeroknit technology lining, our exclusive MIKRO AIR™ shell fabric that’s water-resistant, and underarm knit gussets for breathable comfort. Articulated patterning coupled with built-in stretch ensures premium flexibility with the ideal fit. The only ONE you’ll want. Tapered fit. If you like a looser fit, you may want to go up a size.